深部地热流体温度场中稳态静水压力研究

A study of steady-state hydrostatic pressure in deep geothermal fluid temperature field

通过流体空间势压、热动力压分析,认为流体空间存在等高等压、等势压面及流体循环。在天津市区地下,蓟县雾迷山组储层厚度大于2000m,流体循环条件好。研究表明,地热流体是通过储层下部由北向南径流的;HX-09以西存在地质-水热屏障,受其影响,流体溶解性总固体(TDS)西部比东部高,以东不存在地质-水热屏障,是流体向南径流的主要通道;使用势压分析数据处理方法,能够使圈出的势压降落漏斗与集中地热开采区分布一致(2700m深势压等值线图),这些可为地热监测数据处理、资源预测等提供方法和理论依据。

Based on the analysis of fluid space potential pressure and thermal power pressure,the authors believe that equal altitude and equipressure and equal potential pressure surface and fluid thermal cycling of fluid space exist. The fluid thermal cycling conditions are better when the total thickness of the geothermal reservoir of the Wumishan Group of the Jixian System in Tianjin is greater than 2000 m. The results show that the geothermal fluid runoff from north to south through the reservoirs in the lower part. A geological-water heat barrier exists in the east of HX-09,as a result,the fluid salinity is higher in the west than in the east. There is not geological-water heat barrier in the east,a main channel of the fluid of southward runoff exists. By using the data processing method of potential pressure analyses,the circle can be made of the potential pressure of landing funnel and is consistent with the concentrated geothermal mining area distribution( potential pressure isogram of 2700 m deep). These can be used as methods and theoretical basis for geothermal monitoring data processing and resource forecasting.